常绿阔叶林演替系列中木荷和栲树呼吸作用特性的比较

A comparation of respiration characteristics between Schima superba and Castanopsis fargesii in successional series of evergreen broad leaved forest

研究了常绿阔叶林演替系列群落中木荷 ( Schima superba)和栲树 ( Castanopsis fargesii)不同发育阶段植株的呼吸作用速率及同一演替阶段木荷和栲树不同发育阶段植株的呼吸作用速率的大小。结果表明 ,在常绿阔叶林演替的各个阶段 ,栲树的呼吸作用速率均比木荷的高 ;在群落演替的前期 ,木荷和栲树的呼吸作用速率均较高 ,但随着群落演替的进展 ,其呼吸作用速率逐渐降低。通过比较常绿阔叶林演替后期木荷和栲树成年树的呼吸作用速率 ,并结合二者的光合作用速率 ,反映了栲树的物质代谢能力较高 ,生长较快 ,是其在常绿阔叶林顶极群落中能够成为优势种 ,而木荷成为次优势种的原因之一。

The respiratory rate of different developping stages of Schima superba and Castanopsis fargesii in successional series of evergreen broad leaved forest was studied and the respiratory rates of different developping stages of S.superba and C.fargesii in the same successional stage were compared.The results show that in every successional stage,the respiratory rate of C.fargesii is higher than that of S.superba. In the early successional stage with stronger light intensity,the respiratory rate of S.superba and C.fargesii is higher than that in late successional stage.The metabolic rate of C.fargesii is higher than that of S.superba, and it makes C.fargesii the dominant species and S.superba being second dominant species in evergreen broad leaved forest.